efd8d98dfb
This patch add the HW timestamping infrastructure. The mcp251xfd has a free running timer of 32 bit width, running at max 40MHz, which wraps around every 107 seconds. The current timestamp is latched into RX and TEF objects automatically be the CAN controller. This patch sets up a cyclecounter, timecounter and delayed worker infrastructure (which runs every 45 seconds) to convert the timer into a proper 64 bit based ns timestamp. Link: https://lore.kernel.org/r/20210304160328.2752293-6-mkl@pengutronix.de Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.